A uniform magnetic field of $3000\,G$ is established in the positive $z-$ direction. A rectangular loop of side $10\,cm$ and $5\,cm$ carries a current of $12\,A.$ What is the magnitude of placed as shown torque on the loop is
  • A
    Zero
  • B$1.8 \times 10^{-3}\,N-m$
  • C$9 \times 10^{-4}\,N-m$
  • D
    None of these
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